Cut-off mechanism for straw machines



Oct. 7, 1930. s. r. MALTBY CUT-OFF MECHANISM FOR STRAW MACHINES Filed April 8, 1929 3 Sheets-Sheet 1 Filed April 8, 1929 3 Sheets-Sh e; 2

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[007e, ww/w 1 Oct. 7, 1930. s. T. MALTBY 1, 8

CUT-OFF MECHANISM FOR STRAW MACHINES Filed April 8, 1929 3 Sheets-Sheet 3 JQN llml

in s 1 is a plan Patented Oct. 7, 1930 UNITED s'rA" SIDNEY 'r. mAL'rBY, orwasnme'ron, m

srmw conrona'rron or DE AWARE cyan-on mncnmsu or WASHINGTON, msrnrc'r or commnm, A conrona'rron non STRAW mcnmns -Appl1cation filed April 8, 1929. Serial No. 853,532.

This invention relates to cut-off mechanism for straw machines and it comprises a cutter reciprocable in; a path substantially parallel with that of a continuously formed tube or straw, a strawguide reciprocable in,

unison with the cutter, the guide being periodically moved to carry the straw into cutting relation with the cutter to thereby cut it into convenient lengths; all as will be hereinafter more fully described, and as claimed.

It is an object of my in a cut-oif mechanism for straw machines, wherein a continuously formed paper tube 15 is periodically moved into a cutter travelling in the same direction as the tube,'and is thereby cut into lengths. I

A further object is to provide a cut-off mechanism for a continuously formed paper 20 tube, wherein the'tube is supported in a reciprocable guide adapted, in one direction of its reciprocation, to travel with the tube, the

i a guide also being periodically moved bodily at right angles to the path of a cutterwhich 25 reciprocates in unison 'with the guide, thereby carrying the tube into position to be cut at predetermined intervals in its travel, Other and further objects will'be apparent from the following description andjdraw- 30 in which 4 wview, partly in section, of the cut-.ofi mechanism comprising my invention; 5 I I Figure 2 is an end view of the cut-off, taken from the left of Figure 1;

Figure 3 isa side view.v I

Referring more particularly to the drawin l i shaft 10, 'ournalled in bearings 11 and 12 which are olted to a bed 13, is rotated by any well known means, as pulley 14 and cam disks 15 and 16 are keyed or otherwise afiixed'to the shaft. The cam: disk 15 is formed with a vperipheral cam groove. 17, which guides a roller 18, j ournalled upon the ,pintle 19 of an arm y Also mounted on the bed of the. machine is a standard 21, the upper surface of which is grooved as at 22 to provide inturned flanges 23 for guiding and retaining aslide vention to provide' 24, having a base of complementary shape. The arm is secured to slide 24 to impart a reciprocating movement to the slide in the operation of the mechanism.

The slide 24 has u standing end walls 25 5'5 and 26, which are ormed with ,bosses 27 and 28, respectively, for the rece tion of a 5 rotary shaft 29. The shaft'is driven in any convenient manner, as by a belt (Figures 1 and 2) and pulley 30 The end wall 26 is 0c provided with spaced projections in the form of posts 31 and 32, s own in the drawings as integral parts of the end wall 26, but which, of course, may be detachable.

A straw guide 33 has its opposite side faces 05 vertically groved (as shown more particu-' larly in Figure 1) for the reception of the spaced posts 31 and 32, and itslower portion is bored to receive a tubular guide comprising sections 34 and 35 which are separated by a I slot 36 in the underface of the guide block.

A rotary cutter 37, preferably of disk shape, is 'mounteii on the end of shaft 29 and is so positioned relative to the guiding posts 31 and 32 oftheslide that its cutting 76 edge is presented'tothe slot .36 vformed in the straw guide.

The strawguide 33 is slidabl mdunted on,

a stub shaft 38, carried by abe l crank lever f 39, which is pivoted as at 40 .on a standard so 41 rising from the machine bed. One arm V of the'leyeris provided ,Withan arcuate slot 42 (Figure 2), through which asses a bolt 43 extending from a leverl44. y loosening" the nut on the end of bolt 43 the-levers 39 a5 and 44 may be relatively adjusted to provide a bell crank. lever of variable .angularity,

whereby adjustment may be made to compensate for-wear. I

The arm 44 carries at its pintle 45, on which is mounted a; roller'46 adapted to engageithe cam groove '47 in the I side face' of cam disk 16. In operation of the cut-ofi mechanism, rotation of the shaft 10 causes reciprocation of v the slide through the medium of cam disk 15 and the cooperating arm 20-,which iscarried by the slide. The straimtube guide 33, a

likewise,: is reciprocated because of its engagement with the upright posts 31 and 32 5 end a projdcting 00 the cutter, it is withdrawn, primarily because of the shape ofcam groove 47, but its return is assistedby coiled'springs 48 which surround the upright posts3l-and 32 and are interposed between the straw guide andupright end wall 26 of the slide.

Thus, a continuously formedpaper tube or straw, fed fromthe left as seen in Figures 1 and 3 of the drawing, will be guided in the members 34:, 33 and 35 and will be periodically moved into cutting relation with the rotary cutter, while both the cutter and guide are moving in the same direction as the straw.

tube. Inasmuch as the cutterv is travelling with the tube at the time the cut is made no damage, such as buckling, will result to the tube.

. It is to be understood that this invention is not restricted to the cutting of so-called straws but that it also contemplates the'cutting of larger diameter tubing.

Having described my invention, what I claim is: e

1. Cut-off mechanism for straws compris-' ing a reciprocable'cutter, a straw guide movable in lll'llSOIl with said cutter, and means for bodily moving said straw guide toward said cutter at right angles thereto during their reci rocation', whereby a straw carried by the gui e will be moved into the cutter and severed.

2. Cut-ofl' mechanism for tubes comprising a reciprocating slide, a cutter' carr1ed thereby, a tube guide reciprocable with said slide, and means for periodically imparting to the tube guidea motion of translation to move it bodily toward said cutter, whereby the tube guided thereby will be cut mto lengths. 0

3. Cut-off mechanism for straws comprlspath of the ing a reciprocatingfslide, a rotary cutter carried thereby, a straw guide mounted to reciprocate with said slide, and means inde-' pendent of said slide for periodically moving the straw guide. bodily into the cutting path of said cutter at right angles thereto.

4. Cut-off mechanism for straws comprising a reciprocating slide, a rotary cuttercar;

ried thereby, a straw guide carried by said slide to reciprocate therewith but freely movable in a plane angularly disposed with rel,

' of the cutting path of said cutter.

tion to that in which the slide reciprocates, and meansfor bodil moving said straw guide in such plane by imparting to it a motion of translation to carry it into and ou 5. Cut-off mechanism for tubes comprising a cam operated reciprocating slide, a

cutter carried thereby, a cam operated bodily movable tube guide, guiding means carried by said slide and engaging said tube guide to impart reciprocation thereto in unison with the slide, yet permitting bodily movement of the guide toward and away from the slide, and means for imparting a motion of translation to the ide.

6.-Cut-ofl mechanism for tubes comprising a rotary shaft, a cam actuated by rotation of the shaft, a slide having an arm engaging said cam to impart reciprocation thereto, a rotary cutter carried by said slide, a second cam, a tube guide having a motion of translation imparted to it by said second cam,"guiding means carried by said slide and engaging the tube guide to impart reciprocation thereto in unison with the slide, yet

permitting movement of the guide toward and away from the slide. Y

7. Cut-off mechanism for straws comprising a rotar shaft, a cam mounted on said shaft, a sli e having an arm engaging said cam to be mciprocated thereby, a rotary cutter carried by said slide, a second cam on said shaft, a lever en aging said second cam to be oscillated thereb a stub shaft carried by said lever, a straw guide slidable on said stub shaft, spaced guiding members carried by' the slide and engaging the guide,

whereby the said guide will be reciprocated with the slide by rotation of the first-named cam, and will be independently moved toward said cutter at said second cam.

8. Cutoff mechanism forstraws comprisinga rotary shaft, a' cam mounted on said shaft, a slide, an arm extending from said slideand engaging the cam to impart reciprocating motion to the slide, a rotary cutter mounted on said slide, spaced upright members extending from the slide adjacent the cutter, a straw tube guide grooved to receive said spaced members slidably mounted thereon, a second cam mounted on the shaft, a bell crank lever engagingsaid second cam at one end, a stub shaft projecting from the other end of said bell crank lever, the said straw tube guide being slidable on said stub shaft, am spring means interposed between said slide and guide for normally tending to holdth'e guide away from the cutter.

In testimony whereof I afiix my signature. SIDNEY T. MALTBY.

periodic intervals by 

